User blog comment:Anobi/Second's First Impression/@comment-4720688-20120425184444/@comment-4720688-20120430225513

Just read the TVTropes page on DMC out of boredom, it lists the coin as a Chekhov's gun and a "Fakin' MacGuffin's Batman Gambit". So you were right and half-right, as Batman Gambit seems to be related to Xanatos Gambit.